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/*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <config.h>
#include <common.h>
#include <command.h>
#include <asm/io.h>
#include <asm/ppc4xx-gpio.h>
#define LCD_CMD_ADDR 0x50100002
#define LCD_DATA_ADDR 0x50100003
#define LCD_BLK_CTRL CPLD_REG1_ADDR
static char *amcc_logo = "AMCC 405EP TAIHU EVALUATION KIT";
static int addr_flag = 0x80;
static void lcd_bl_ctrl(char val)
{
out_8((u8 *) LCD_BLK_CTRL, in_8((u8 *) LCD_BLK_CTRL) | val);
}
static void lcd_putc(int val)
{
int i = 100;
char addr;
while (i--) {
if ((in_8((u8 *) LCD_CMD_ADDR) & 0x80) != 0x80) { /*BF = 1 ?*/
udelay(50);
break;
}
udelay(50);
}
if (in_8((u8 *) LCD_CMD_ADDR) & 0x80) {
printf("LCD is busy\n");
return;
}
addr = in_8((u8 *) LCD_CMD_ADDR);
udelay(50);
if ((addr != 0) && (addr % 0x10 == 0)) {
addr_flag ^= 0x40;
out_8((u8 *) LCD_CMD_ADDR, addr_flag);
}
udelay(50);
out_8((u8 *) LCD_DATA_ADDR, val);
udelay(50);
}
static void lcd_puts(char *s)
{
char *p = s;
int i = 100;
while (i--) {
if ((in_8((u8 *) LCD_CMD_ADDR) & 0x80) != 0x80) { /*BF = 1 ?*/
udelay(50);
break;
}
udelay(50);
}
if (in_8((u8 *) LCD_CMD_ADDR) & 0x80) {
printf("LCD is busy\n");
return;
}
while (*p)
lcd_putc(*p++);
}
static void lcd_put_logo(void)
{
int i = 100;
char *p = amcc_logo;
while (i--) {
if ((in_8((u8 *) LCD_CMD_ADDR) & 0x80) != 0x80) { /*BF = 1 ?*/
udelay(50);
break;
}
udelay(50);
}
if (in_8((u8 *) LCD_CMD_ADDR) & 0x80) {
printf("LCD is busy\n");
return;
}
out_8((u8 *) LCD_CMD_ADDR, 0x80);
while (*p)
lcd_putc(*p++);
}
int lcd_init(void)
{
puts("LCD: ");
out_8((u8 *) LCD_CMD_ADDR, 0x38); /* set function:8-bit,2-line,5x7 font type */
udelay(50);
out_8((u8 *) LCD_CMD_ADDR, 0x0f); /* set display on,cursor on,blink on */
udelay(50);
out_8((u8 *) LCD_CMD_ADDR, 0x01); /* display clear */
udelay(2000);
out_8((u8 *) LCD_CMD_ADDR, 0x06); /* set entry */
udelay(50);
lcd_bl_ctrl(0x02); /* set backlight on */
lcd_put_logo();
puts("ready\n");
return 0;
}
static int do_lcd_clear (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
out_8((u8 *) LCD_CMD_ADDR, 0x01);
udelay(2000);
return 0;
}
static int do_lcd_puts (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
if (argc < 2)
return cmd_usage(cmdtp);
lcd_puts(argv[1]);
return 0;
}
static int do_lcd_putc (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
if (argc < 2)
return cmd_usage(cmdtp);
lcd_putc((char)argv[1][0]);
return 0;
}
static int do_lcd_cur (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
ulong count;
ulong dir;
char cur_addr;
if (argc < 3)
return cmd_usage(cmdtp);
count = simple_strtoul(argv[1], NULL, 16);
if (count > 31) {
printf("unable to shift > 0x20\n");
count = 0;
}
dir = simple_strtoul(argv[2], NULL, 16);
cur_addr = in_8((u8 *) LCD_CMD_ADDR);
udelay(50);
if (dir == 0x0) {
if (addr_flag == 0x80) {
if (count >= (cur_addr & 0xf)) {
out_8((u8 *) LCD_CMD_ADDR, 0x80);
udelay(50);
count = 0;
}
} else {
if (count >= ((cur_addr & 0x0f) + 0x0f)) {
out_8((u8 *) LCD_CMD_ADDR, 0x80);
addr_flag = 0x80;
udelay(50);
count = 0x0;
} else if (count >= ( cur_addr & 0xf)) {
count -= cur_addr & 0xf ;
out_8((u8 *) LCD_CMD_ADDR, 0x80 | 0xf);
addr_flag = 0x80;
udelay(50);
}
}
} else {
if (addr_flag == 0x80) {
if (count >= (0x1f - (cur_addr & 0xf))) {
count = 0x0;
addr_flag = 0xc0;
out_8((u8 *) LCD_CMD_ADDR, 0xc0 | 0xf);
udelay(50);
} else if ((count + (cur_addr & 0xf ))>= 0x0f) {
count = count + (cur_addr & 0xf) - 0x0f;
addr_flag = 0xc0;
out_8((u8 *) LCD_CMD_ADDR, 0xc0);
udelay(50);
}
} else if ((count + (cur_addr & 0xf )) >= 0x0f) {
count = 0x0;
out_8((u8 *) LCD_CMD_ADDR, 0xC0 | 0x0F);
udelay(50);
}
}
while (count--) {
if (dir == 0)
out_8((u8 *) LCD_CMD_ADDR, 0x10);
else
out_8((u8 *) LCD_CMD_ADDR, 0x14);
udelay(50);
}
return 0;
}
U_BOOT_CMD(
lcd_cls, 1, 1, do_lcd_clear,
"lcd clear display",
""
);
U_BOOT_CMD(
lcd_puts, 2, 1, do_lcd_puts,
"display string on lcd",
"<string> - <string> to be displayed"
);
U_BOOT_CMD(
lcd_putc, 2, 1, do_lcd_putc,
"display char on lcd",
"<char> - <char> to be displayed"
);
U_BOOT_CMD(
lcd_cur, 3, 1, do_lcd_cur,
"shift cursor on lcd",
"<count> <dir> - shift cursor on lcd <count> times, direction is <dir> \n"
" <count> - 0..31\n"
" <dir> - 0=backward 1=forward"
);
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